EP3869596A1 - Électrode pour batteries secondaires lithium-ion et batterie secondaire lithium-ion - Google Patents

Électrode pour batteries secondaires lithium-ion et batterie secondaire lithium-ion Download PDF

Info

Publication number
EP3869596A1
EP3869596A1 EP21155153.6A EP21155153A EP3869596A1 EP 3869596 A1 EP3869596 A1 EP 3869596A1 EP 21155153 A EP21155153 A EP 21155153A EP 3869596 A1 EP3869596 A1 EP 3869596A1
Authority
EP
European Patent Office
Prior art keywords
electrode
lithium ion
ion secondary
secondary batteries
electrode layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP21155153.6A
Other languages
German (de)
English (en)
Inventor
Kiyoshi Tanaami
Yuji Isogai
Makiko TAKAHASHI
Shintaro Aoyagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Publication of EP3869596A1 publication Critical patent/EP3869596A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/134—Electrodes based on metals, Si or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/364—Composites as mixtures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/366—Composites as layered products
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/80—Porous plates, e.g. sintered carriers
    • H01M4/808—Foamed, spongy materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to an electrode for lithium ion secondary batteries, and a lithium ion secondary battery made using this electrode for lithium ion batteries.
  • Lithium ion secondary batteries have a structure made by having a separator present between the positive electrode and negative electrode, and filling a liquid electrolyte (electrolytic solution).
  • foam metal As a method of increasing the filling density of electrode active material, it has been proposed to use foam metal as the collector constituting the positive electrode layer and the negative electrode layer (refer to Patent Documents 2 and 3).
  • the foam metal has a network structure with uniform micropore size, and large surface area. By filling the electrode mixture containing the electrode active material inside of this network structure, it is possible to increase the amount of active material per unit area of the electrode layer.
  • the electrode made using foam metal as the collector can prepare an electrode of high loaded volume compared to a coated electrode made using metal foil as the collect, the migration distance of electrons and lithium ions has been longer due to the film thickness becoming greater.
  • FIG. 2 shows an electrode made using foam metal as the collector.
  • an electrode mixture containing electrode active material is filled into the collector consisting of foam metal, whereby the electrode layer 101 is formed.
  • the electrode tab 102 connected by ultrasonic welding or the like to the foam metal extends from an end face of the electrode layer 101.
  • the arrows of solid lines indicate the movement of lithium ions in the electrode layer 101
  • the arrows of dotted lines indicate the movement of electrons in the electrode layer 101.
  • the electrode 100 establishing foam metal as the collector can form the electrode layer 101 of high loaded volume compared to an electrode coating the electrode mixture onto a metal foil.
  • the migration distance of electrons indicated by the arrows of dotted lines, and the migration distance of lithium ion indicated by the arrows of solid lines become large.
  • the region of the electrode layer 101 in the vicinity of the electrode tab indicated by "A” is a region in which the cell reaction tends to advance due to the migration distance of electrode being short, and thus degradation of the electrode is fast.
  • "B” which is a region of the electrode layer far from the electrode tab is a region in which the cell reaction hardly advances due to the migration distance of electrons being large, and thus degradation of the electrode is low.
  • the electrode made using foam metal as the collector becomes an electrode having large film thickness, the permeability of the electrolytic solution declines, and permeation of the electrolytic solution to the electrode interior becomes insufficient. For this reason, the supply of anions and cations is deficient, and the internal resistance of the formed lithium ion secondary battery cell increases, whereby the input/output characteristics of the batter (output density) declines.
  • the present invention has been made taking account of the above, and the objection thereof is to provide an electrode for lithium ion secondary batteries which is an electrode for obtaining a lithium ion secondary batteries having high energy density with foam metal as the collector, and further being able to improve durability and input/output characteristics (output density), as well as a lithium ion secondary battery made using this electrode for lithium ion secondary batteries.
  • the present inventors have carried out thorough examination in order to solve the above problem. Then, it was found that, if configuring the electrode layer of an electrode for lithium ion secondary batteries using a collector consisting of foam metal by dividing into a plurality of electrode divided parts, since the migration distance of electrons and migration distance of ions in each of the electrode divided parts becomes shorter, it is possible to realize lithium ion secondary battery having improved durability and input/output characteristics (output density), while maintaining the energy density to be high, thereby arriving at completion of the present invention.
  • an aspect of the present invention is an electrode for lithium ion secondary batteries, including: a collector which is a foam porous body consisting of metal; an electrode layer in which an electrode mixture is filled into the collector; and an electrode tab, in which the electrode layer is configured by a plurality of electrode divided parts.
  • a flow channel may be provided between the electrode divided parts which are adjacent.
  • An electrolytic solution may be filled into the flow channel.
  • the electrode divided parts may be disposed on a base plate.
  • the electrode layer may be configured by two electrode divided parts.
  • a plurality of the electrode divided parts may be connected to the electrode tab.
  • the electrode layer may be configured by four electrode divided parts.
  • the flow channels may be disposed substantially in parallel.
  • the flow channels may be disposed substantially in perpendicular.
  • the collector may be foam aluminum.
  • the electrode for lithium ion secondary batteries may be a positive electrode.
  • the foam porous body may be foam copper.
  • the electrode for lithium ion secondary batteries may be a negative electrode.
  • a lithium ion secondary battery including: a positive electrode; a negative electrode; and a separator or solid electrolyte layer located between the positive electrode and the negative electrode, in which at least one of the positive electrode and the negative electrode is the electrode for lithium ion secondary batteries as described above.
  • the electrode for lithium ion secondary batteries of the present invention it is possible to obtain a lithium ion secondary battery having high energy density, and improved durability and input/output characteristics.
  • the electrode for lithium ion secondary batteries includes: a collector which is a foam porous body consisting of metal, electrode layers in which an electrode mixture is filled into the collector, and electrode tabs.
  • the batteries to which the electrode for lithium ion secondary batteries of the present invention can be applied are not particularly limited, so long as using an electrolytic solution which is a liquid electrolyte.
  • the electrolyte for lithium ion secondary batteries of the present invention can be used without problem even if be applied to the positive electrode of a lithium ion secondary battery, applied to the negative electrode, or applied to both.
  • the electrode for lithium ion secondary batteries of the present invention can acquire a higher effect when used in the positive electrode.
  • the structure of the electrode for lithium ion secondary batteries of the present invention is not particularly limited, and may be laminate type or winding type.
  • the collector constituting the electrode for lithium ion secondary batteries of the present invention is a foam porous body consisting of metal.
  • the foam porous body consisting of metal is not particular limited so long as being a porous body of metal having voids due to foaming.
  • the metal foam has a network structure, in which the surface area is high.
  • a foam porous body consisting of metal as the collector, since it is possible to fill the electrode mixture containing electrode active material inside of this network structure, it is possible to increase the active material amount per unit area of the electrode layer, and as a result thereof, possible to improve the volumetric energy density of the lithium ion secondary battery.
  • the metal of the foam porous body consisting of metal for example, nickel, aluminum, stainless steel, titanium, copper, silver, etc.
  • metal for example, nickel, aluminum, stainless steel, titanium, copper, silver, etc.
  • a foam aluminum is preferable
  • foam copper or foam stainless steel can be preferably used as the collector constituting the negative electrode.
  • the electrode layer in the electrode for lithium ion secondary batteries of the present invention has an electrode mixture filled into the collector, which is a foam porous body consisting of metal.
  • the thickness of the electrode layer is not particularly limited; however, the electrode for lithium ion secondary batteries of the present invention can form an electrode layer of large thickness due to using a foam porous body consisting of metal as the collector. As a result thereof, the active material amount per unit area of the electrode layer increases, and it is possible to obtain a battery of high energy density.
  • the thickness of the electrode layer of the electrode for lithium ion secondary batteries of the present invention is 200 to 400 pm, for example.
  • the electrode mixture constituting the electrode layer of the present invention at least includes the electrode active material.
  • the electrode mixtures which can be applied to the present invention may optionally include other components, so long as including the electrode active material as an essential component.
  • the other components are not particularly limited, and it is sufficient so long as being a component which can be used upon preparing the lithium ion secondary battery.
  • a solid-state electrode, conductive auxiliary agent, binding agent, etc. can be exemplified.
  • the positive electrode mixture constituting the positive electrode layer may include at least the positive electrode active material, and as other components, may include a solid-state electrolyte, conduction auxiliary agent, binding agent, etc., for example.
  • the positive electrode active material so long as being a material which can occlude and release lithium ions, it is not particularly limited; however, LiCoO 2 , Li(Ni 5/10 Co 2/10 Mn 3/10 )O 2 , Li(Ni 6/10 Co 2/10 Mn 2/10 )O 2 , Li(Ni 8/10 Co 1/10 Mn 1/10 )O 2 , Li(Ni 0.8 Co 0.15 Al 0.05 )O 2 , Li(Ni 1/6 Co 4/6 Mn 1/6 )O 2 , Li(Ni 1/3 Co 1/3 Mn 1/3 )O 2 , LiCoO 4 , LiMn 2 O 4 , LiNiO 2 , LiFePO 4 , lithium sulfide, sulfur, etc. can be exemplified.
  • the negative electrode mixture constituting the negative electrode layer may include at least the negative electrode active material, and as other components, may include a solid-state electrolyte, conduction auxiliary agent, binding agent, etc., for example.
  • the negative electrode active material although not particularly limited so long as being able to occlude and release lithium ions, for example, it is possible to exemplify metallic lithium, lithium alloy, metal oxide, metal sulfide, metal nitride, Si, SiO, and carbon materials such as artificial graphite, natural graphite, hard carbon and soft carbon.
  • the electrode layer in the electrode for lithium ion secondary batteries of the present invention is configured by a plurality of electrode divided parts.
  • the electrode for lithium ion secondary batteries of the present invention can shorten the migration distance of electrons and the migration distance of ions in each of the electrode divided parts.
  • the electrode layer in the electrode for lithium ion secondary batteries of the present invention is preferably arranged on a base plate having electron conductivity.
  • the electrode divided parts constituting the electrode layer are preferably established in a state arranged on the base plate.
  • the electrode divided parts being arranged on the base plate having electron conductivity, electron conductivity is imparted to the electrode for lithium ion secondary batteries of the present invention, and migration of electrons between electrode divided parts is facilitated, and thus it is possible to further suppress local variation in the cell reaction.
  • the base plate having electron conductivity is not particularly limited; however, aluminum foil, copper foil, stainless steel foil, etc. can be exemplified, for example.
  • the shape of the electrode divided part is not particularly limited. It can be formed in various shapes. Thereamong, the electrode divided part is preferably a square column or circular column shape. The square columnar or circular columnar electrode divided part is easily prepared, and thus uniformly forming the flow channels described layer in the electrode layer becomes easy.
  • Each of the plurality of electrode divided parts is preferably connected to an electrode tab. It is possible to facilitate current collection of the electrode by the electrode tabs being connected to each of the electrode divided parts. In addition, in the case of adopting a base plate, it is more preferable to connect the electrode tabs to the base plate.
  • the electrode for lithium ion secondary batteries of the present invention it is preferable for a plurality of electrode divided parts to be connected to one electrode tab. If a form in which a plurality of electrode divided parts is connected to one electrode tab, since it is possible to decrease the total number of electrode tabs in the electrode, the volume of the electrode can be made smaller, a result of which it is possible to suppress a decline in the volumetric energy density of the cell.
  • the number of electrode divided parts constituting the electrode layer is at least two, it is not particularly limited. However, if the number is too large, since difficulty will arise in connection, etc. with electrode tab, it is preferable to set as a maximum of ten in each of the electrode layers.
  • the electrode tab In the case of the electrode layer of the electrode for lithium ion secondary batteries of the present invention being configured by two electrode divided parts, for example, it is preferable for the electrode tab to be connected to each electrode divided part. In the case of the electrode layer being configured by two electrode divided parts, it becomes possible to suppress a resistance increase, without causing the energy density to decline.
  • the electrode layer being configured by four electrode divided parts, for example, it is preferable for two electrode divided parts to be connected to one electrode tab.
  • two electrode divided parts being connected to one electrode tab, it becomes possible to simultaneously improve the electron conductivity and ion conductivity, and the input/output characteristics greatly improves.
  • a flow channel is preferably provided between adjacent electrode divided parts.
  • the electrode divided parts each preferably exist as a separate, independent island. Then, the flow channel is formed in the gap between adjoining electrode divided parts.
  • the face forming the flow channel of the electrode divided part is the state of the electrode layer in which the electrode mixture is filled into the foam porous body.
  • an electrolytic solution is preferably filled into the flow channel.
  • the electrolytic solution being filled into the flow channel, the permeability of the electrolytic solution to the electrode interior improves, and it is possible to shorten the migration distance of anion and cation, and the ion conductivity can be sufficiently ensured.
  • the film thickness of the electrode layer is larger, since it is possible to shorten the migration distance of ions within the electrode, it is possible to suppress an increase in the ion diffusion resistance, and as a result thereof, it is possible to improve the durability of the rate characteristic, etc. In particular, since it becomes possible to rapidly supply ions in the case of a high load such as a rapid charger being applied, it can contribute to a durability improvement under a high load environment.
  • the film thickness of the electrode layer is large, since it is possible to suppress a supply shortage of electrons, it is possible to suppress an increase in electron resistance, and improve the output characteristic of the lithium ion secondary battery.
  • the flow channel is preferably formed so as to make an arrangement passing through substantially the center in the plane of the electrode layer.
  • the flow channel is preferably formed so as to make an arrangement passing through substantially the center in the plane of the electrode layer.
  • this one flow channel is preferably formed so as to pass through substantially the center in the plane of the electrode layer.
  • two or three of the flow channels will be formed.
  • an example can be exemplified arranging these two flow channels substantially perpendicular, so as depict a cross intersecting at substantially the center in the plane of the electrode layer.
  • an arrangement of three an example can be exemplified configuring so that one among these three flow channels passes through substantially the center in the plane of the electrode layer, and arranging the remaining two flow channels substantially in parallel at almost equal intervals, so as to be substantially symmetrical with the one as the center.
  • FIG. 1 The arrangement of the electrode divided parts and flow channels of the electrode for lithium ion secondary batteries of the present invention will be explained using FIG. 1 .
  • FIG. 1 is a view showing an embodiment of an electrode for lithium ion secondary batteries of the present invention.
  • the electrode layer is configured by four of the electrode divided parts 11, and the four electrode divided parts 11 are formed on the base plate 13.
  • two of the electrode tabs 12 are extending from the pair of corresponding end faces of the electrode layer.
  • two flow channels are formed substantially perpendicularly between the adjoining electrode divided parts 11 in the electrode layer, so as to depict a cross intersecting at substantially the center in the plane of the electrode layer.
  • the shape of the four electrode divided parts 11 in FIG. 1 is a square column of substantially the same size. Then, the two flow channels are formed so as to penetrate the electrode layer from one end face of the electrode layer until another end face.
  • the electrolytic solution is filled into the two flow channels, and the arrow of the solid line in FIG. 1 indicates the movement of lithium ion in the electrode layer, and the arrows of the dotted line indicate the movement of electrons in the electrode layer.
  • the two flow channels being formed substantially perpendicular so as to depict a cross intersecting at substantially the center in the plane of the electrode laminate, it is possible to easily supply electrolytic solution to the central part of the electrode layer. As a result thereof, it is possible to improve movement of the electrolytic solution, and migration of lithium ion, and thus possible to suppress the ion diffusion resistance.
  • the migration distance of electrons in each electrode divided part 11 becomes shorter, and thus variation in cell reaction can be suppressed.
  • the base plate 13 having high electron conductivity is arranged at the lower part of the electrode divided parts 11, the migration of electrons between electrode divided parts 11 is facilitated, and it becomes possible to further suppress reaction variation.
  • the occupancy rate of the flow channels in the electrode layer is not particularly limited; however, it is preferably set to 0.5% to 5% relative to the electrode layer overall.
  • the decline in volumetric energy density of the cell stays at no more than 5 Wh/L, and thus there is no great influence; however, in the case of exceeding 5%, since the amount of electrolytic fluid increases in addition to the decline in volumetric energy density, the electron conductivity declines at the same time as the weight energy density declining, and thus the input/output characteristics of the cell overall declines.
  • the production method of the electrode for lithium ion secondary batteries of the present invention is not particularly limited, and can adopt a usual method in the present technical field.
  • the electrode for lithium ion secondary batteries of the present invention has an electrode layer in which an electrode mixture is filled in the collector consisting of foam porous body consisting of metal, and the electrode layer is configured by a plurality of electrode divided parts.
  • the method of filling the electrode mixture into the collector is not particularly limited; however, for example, a method of filling a slurry containing the electrode mixture inside of the network structure of the collector using a pressure-type die coater and applying pressure can be exemplified.
  • the electrode for lithium ion secondary batteries After filling the electrode mixture, it is possible to obtain the electrode for lithium ion secondary batteries by adopting a common method in the present technical field.
  • the electrode for lithium ion secondary batteries is obtained by drying the collector in which the electrode mixture was filled, followed by pressing.
  • the density of the electrode mixture can be improved by pressing, and it is possible to adjust so as to be the desired density.
  • the method of forming the electrode divided part is not particularly limited; however, for example, a method of shearing the foam metal in advance and filling the electrode mixture, and a method of shearing after filling of the electrode mixture can be exemplified.
  • the method of connecting the electrode tab to the electrode divided part is not particularly limited; however, for example, ultrasonic welding, spot welding, etc. can be exemplified.
  • the lithium ion secondary battery of the present invention includes a positive electrode, a negative electrode, and a separator or solid-state electrolyte layer located between the positive electrode and negative electrode.
  • a positive electrode In the lithium ion secondary battery of the present invention, at least one of the positive electrode and negative electrode is the above-mentioned electrode for lithium ion secondary batteries of the present invention.
  • the lithium ion secondary battery of the present invention the positive electrode may be the electrode for lithium ion secondary batteries of the present invention, the negative electrode may be the electrode for lithium ion secondary batteries of the present invention, or both may be the electrode for lithium ion secondary batteries of the present invention.
  • the positive electrode or the negative electrode not adopting the electrode for lithium ion secondary batteries of the present invention is not particularly limited, and may be any electrode functioning as the positive electrode and negative electrode of a lithium ion secondary battery.
  • the positive electrode and negative electrode constituting the lithium ion secondary battery can constitute any battery by selecting two types from among materials which can constitute electrodes, comparing the charge/discharge potentials of the two types of compounds, then using one exhibiting electropositive potential as the positive electrode, and one exhibiting electronegative potential as the negative electrode.
  • the separator is located between the positive electrode and the negative electrode.
  • the material, thickness, etc. thereof are not particularly limited, and it is possible to adopt a known separator which can be used in a lithium ion secondary battery.
  • the solid-state electrolyte constituting a cell is located between the positive electrode and the negative electrode.
  • the solid-state electrolyte contained in the solid-state electrolyte layer is not particularly limited, and is sufficient so long as lithium ion conduction between the positive electrode and negative electrode is possible.
  • an oxide-based electrolyte or sulfide-based electrolyte can be exemplified.
  • a foam aluminum having a thickness of 1.0 mm, porosity of 95%, cell number of 46-50 per inch, pore size of 0.5 mm, and specific surface area of 5000 m 2 /m 3 was prepared as the collector.
  • LiNi 0.5 Co 0.2 Mn 0.3 O 2 was prepared as the positive electrode active material.
  • the positive electrode mixture slurry was produced by mixing 94 mass% positive electrode active material, 4 mass% carbon black as the conduction auxiliary agent, and 2 mass% polyvinylidene fluoride (PVDF) as a binder, and dispersing the obtained mixture in the appropriate amount of N-methyl-2-pyrrolidone (NMP).
  • PVDF polyvinylidene fluoride
  • foam aluminum was sheared into four pieces with sizes of 35 mm height and 40 mm width.
  • the prepared positive electrode mixture slurry was coated onto four pieces of foam aluminum, so as have a coating amount of 90 mg/cm 2 . Then, by drying for 12 hours at 120°C in vacuum and then roll pressing with 15 tons pressure, the positive electrode layer for lithium ion secondary batteries was produced.
  • one tab was welded to two positive electrode layers by ultrasonic welding. Similarly, by welding a tab to the remaining two positive electrode layers, two identical pieces were prepared.
  • the positive electrode divided part of the obtained positive electrode for lithium ion secondary batteries had a basis weight of 90 mg/cm 2 , and density of 3.2 g/cm 3 .
  • Example 2 The obtained positive electrode for lithium ion secondary batteries is shown in FIG. 3 .
  • Example 1 four positive electrode divided parts 21 of 35 mm height, 40 mm width and 300 ⁇ m thickness were formed, and two flow channels of 1 mm width were formed substantially perpendicular in the positive electrode layer, so as to depict a cross intersecting substantially the center in the plane of the positive electrode layer. Then, the two flow channels were formed so as to penetrate the electrode layer from one end face of the positive electrode layer until the other end face.
  • two positive electrode tabs 22 respectively connect to two positive electrode divided parts 21, they extend from a pair of corresponding end faces of the positive electrode layer.
  • a foam aluminum was prepared having a thickness of 1.0 mm, porosity of 95%, cell number of 46 to 50 per inch, pore size of 0.5 mm and specific surface area of 5000 m 2 /m 3 as the collector.
  • a negative electrode mixture slurry was produced by mixing 96.5 mass% of natural graphite, 1 mass% of carbon black as a conduction auxiliary agent, 1.5 mass% of styrene-butadiene rubber (SBR) as a binder, and 1 mass% of sodium carboxymethyl cellulose (CMC) as a thickening agent, and dispersing the obtained mixture in the appropriate amount of distilled water.
  • SBR styrene-butadiene rubber
  • CMC sodium carboxymethyl cellulose
  • the produced negative electrode mixture slurry was coated onto the collector using a die coater so as to make a coating amount of 45 mg/cm 2 .
  • the negative electrode for lithium ion secondary batteries was produced.
  • the electrode layer of the obtained negative electrode for lithium ion secondary batteries had a basis weight of 45 mg/cm 2 , and density of 1.5 g/cm 3 .
  • the produced negative electrode was used by punch processing to 74 mm x 84 mm.
  • Example 1 The obtained negative electrode for lithium ion secondary batteries is shown in FIG. 3 .
  • Example 1 a negative electrode layer of 74 mm height, 84 mm width and 300 ⁇ m thickness was formed, and two negative electrode tabs 32 extend from a pair of corresponding end faces of the negative electrode layer.
  • a microporous membrane made into a three-layer laminate of polypropylene/ polyethylene/ polypropylene of 25 ⁇ m thickness was prepared as the separator, and punched to a size of 80 mm x 90 mm.
  • a laminate made by arranging the separator between the positive electrode and negative electrode prepared as described above was inserted to prepare a laminate cell.
  • a solution was prepared in which 1.2 moles of LiPF 6 was dissolved in a solvent prepared by mixing ethylene carbonate, dimethyl carbonate and ethyl methyl carbonate in the volumetric ratio of 3:4:3, then injected into the above-mentioned laminate to produce the lithium ion secondary battery.
  • Example 3 The configuration of the electrode laminate of the lithium ion secondary battery produced in Example 1 is shown in FIG. 3 .
  • a separator 81 was arranged between the positive electrode and negative electrode, and two positive electrode tabs 22 and two negative electrode tabs 32 made a perpendicular arrangement.
  • the positive electrode for lithium ion secondary batteries was produced similarly to Example 1.
  • the positive electrode divided parts in the obtained positive electrode for lithium ion secondary batteries had a basis weight of 90 mg/cm 2 , and density of 3.2 g/cm 3 .
  • Example 2 The obtained positive electrode for lithium ion secondary batteries is shown in FIG. 4 .
  • Example 2 similarly to Example 1, four positive electrode divided parts 41 of 35 mm height, 40 mm width and 300 ⁇ m thickness were formed, and two flow channels of 1 mm width were formed substantially perpendicular in the positive electrode layer, so as to depict a cross intersecting substantially the center in the plane of the positive electrode layer. Then, the two flow channels were formed so as to penetrate the electrode layer from one end face of the positive electrode layer until the other end face.
  • the negative electrode mixture slurry was produced similarly to Example 1.
  • a foam copper was prepared having a thickness of 1.0 mm, porosity of 95%, cell number of 46 to 50 per inch, pore size of 0.5 mm and specific surface area of 5000 m 2 /m 3 as the collector.
  • foam copper was sheared into four with sizes of 37 mm height and 42 mm width.
  • the prepared negative electrode mixture slurry was coated onto the four pieces of foam copper, so as have a coating amount of 45 mg/cm 2 .
  • the negative electrode layer for lithium ion secondary batteries was produced.
  • one tab was welded to two negative electrode layers by ultrasonic welding. Similarly, by welding a tab to the remaining two negative electrode layers, two identical pieces were prepared.
  • the negative electrode divided part in the electrode layer of the obtained negative electrode for lithium ion secondary batteries had a basis weight of 45 mg/cm 2 , and density of 1.5 g/cm 3 .
  • the obtained negative electrode for lithium ion secondary batteries is shown in FIG. 4 .
  • Example 2 four negative electrode divided parts 51 of 37 mm height, 42 mm width and 300 ⁇ m thickness were formed, and two flow channels of 1 mm width were formed substantially perpendicular in the negative electrode layer, so as to depict a cross intersecting substantially the center in the plane of the negative electrode layer. Then, the two flow channels were formed so as to penetrate the electrode layer from one end face of the positive electrode layer until the other end face.
  • two negative electrode tabs 52 respectively connect to two negative electrode divided parts 51, they extend from a pair of corresponding end faces of the negative electrode layer.
  • the lithium ion secondary battery was produced similarly to Example 1.
  • Example 2 The configuration of the electrode laminate of the lithium ion secondary battery produced in Example 2 is shown in FIG. 4 .
  • a separator 82 was arranged between the positive electrode and negative electrode, and two positive electrode tabs 42 and two negative electrode tabs 52 made a perpendicular arrangement.
  • the positive electrode layer for lithium ion secondary batteries was produced similarly to Example 1, other than punching to 70 mm x 80 mm and using without forming positive electrode divided parts. Only one positive electrode tab was connected by the same method as Example 1 to the prepared positive electrode layer to obtain the positive electrode for lithium ion secondary batteries.
  • the electrode layer in the positive electrode in the obtained positive electrode for lithium ion secondary batteries had a basis weight of 90 mg/cm 2 , and density of 3.2 g/cm 3 .
  • the negative electrode for lithium ion secondary batteries was produced similarly to Example 1, except for connecting only one negative electrode tab.
  • a lithium ion secondary battery was produced similarly to Example 1, other than using the positive electrode and negative electrode prepared above.
  • FIG. 5 The configuration of the electrode laminate body of the lithium ion secondary battery produced in Comparative Example 1 is shown in FIG. 5 .
  • a separator 83 was arranged between the positive electrode and negative electrode, and the positive electrode tab 62 and negative electrode tab 72 made an arrangement extending from a pair of opposing end faces.
  • the lithium ion secondary battery was left for 3 hours at the measurement temperature (25°C), constant-current charging was performed until 4.2 V at 0.33C, then constant-voltage charging was performed for 5 hours at a voltage of 4.2 V, and left for 30 minutes, followed by performing discharging until 2.5 V at a discharge rate of 0.33C to measure the discharge capacity.
  • the obtained discharge capacity was defined as the initial discharge capacity.
  • the lithium ion secondary batteries after the initial discharge capacity measurement were adjusted to 50% charge level (SOC (State of Charge)). Next, they were discharged for 10 seconds with a current value of the value of 0.2C, and the voltage after 10 seconds was measured. Then, with the current value as the horizontal axis and the voltage as the vertical axis, each voltage after 0.1 seconds, 1 second and 10 seconds was plotted relative to the current of 0.2C. Next, after leaving for 10 minutes, the SOC was returned to 50% by performing auxiliary charging, and then left for 10 more minutes. Next, the same operations as mentioned above were performed for each C rate of 0.5C, 1.0C, 1.5C, 2.0C, 2.5C, and each voltage after 0.1 seconds, 1 second and 10 seconds relative to charging at each C rate were plotted. The slope of the approximate line obtained from each plot was defined as the initial cell resistance of the lithium ion secondary battery.
  • the lithium ion secondary battery after the initial discharge capacity measurement was left for 3 hours at the measurement temperature (25°C), the constant-current charging was performed until 4.2 V at 0.33C, then constant-voltage charging was performed for 5 hours until the voltage of 4.2 V, and left for 30 minutes, followed by performing discharging until 2.5 V at the discharge rate of 0.5C to measure the discharge capacity.
  • the above-mentioned experiments were performed for each C rate of 1C, 1.5C, 2C and 2.5C, and the data summarizing the discharge capacities at each C rate by the capacity retention rate when defining the capacity of 0.33C as 100% was defined as the C rate characteristic.
  • one cycle was defined as the operations of performing constant-current charging until 4.2 V at 0.6C with a constant temperature oven at 45°C, followed by performing constant-voltage changing until the voltage of 4.2 V or charging for 5 hours or until becoming a current of 0.1C, and then leaving for 30 minutes, and then performing constant-current discharge until 2.5 V at a discharge rate of 0.6C and leaving for 30 minutes, and this operation was repeated for 200 cycles.
  • the constant temperature oven was set to 25°C, and left for 24 hours in a state after 2.5 V discharging, after which the discharge capacity was measured similarly to the measurement of the initial discharge capacity. This operation was repeated for every 200 cycles, and measured until 600 cycles.
  • the discharge capacity for every 200 cycles relative to the initial discharge capacity was obtained, and defined as the capacity retention for each cycle.
  • the cell resistance after enduring 600 cycles relative to the initial cell resistance was obtained, and defined as the resistance change rate.
  • Table 1 shows various measurement results of the lithium ion secondary batteries produced in the Examples and Comparative Examples.
  • FIG. 6 shows the initial cell resistance of the lithium ion secondary batteries produced in the Examples and Comparative Examples, and
  • FIG. 7 shows the C rate characteristic of the lithium ion secondary batteries produced in the Examples and Comparative Examples.
  • FIG. 8 shows the capacity retention for every 200 cycles.
  • Example 1 Comparative Example 1 Initial discharge capacity (mAh) 1684 1659 1729 Initial cell resistance ( ⁇ ) at discharge side 0.1S:Electronic resistance 53 35 81 1S:Reaction resistance 5 3 11 10S:Ion diffusion resistance 15 9 20 Total 74 47 112 C-rate characteristic 0.5 C Discharge capacity(mAh) 1620 1626 1666 0.5 C Capacity retention(%) 96.2 98.0 96.4 0.75 C Discharge capacity(mAh) 1578 1601 1628 0.75 C Capacity retention(%) 93.7 96.5 94.2 1.0 C Discharge capacity(mAh) 1548 1578 1596 1.0 C Capacity retention(%) 91.9 95.1 92.3 1.5 C Discharge capacity(mAh) 1502 1540 1548 1.5 C Capacity retention(%) 89.2 92.8 89.6 2.0 C Discharge capacity(mAh) 1465 1507 1484 2.0 C Capacity retention (%) 86.9 90.9 85.9 2.5 C Discharge capacity (mAh) 1416 1480 1267 2.5 C Capacity retention (%) 84.1 89.2
  • the C rate characteristics of the batteries of Examples 1 and 2 became high values compared to the battery of Comparative Example 1.
  • the battery made using the electrode for lithium ion secondary batteries of the present invention configuring the electrode layers by electrode divided parts, the ion diffusivity improved.
  • the capacity retention for every 200 cycles of the batteries of Examples 1 and 2 becomes a higher value as the cycle number increases, compared to the battery of Comparative Example 1.
  • the durability improved With the battery made using the electrode for lithium ion secondary batteries of the present invention configuring the electrode layers by the electrode divided parts, the durability improved.
  • an electrode for lithium ion secondary batteries which is an electrode for obtaining a lithium ion secondary batteries having high energy density with foam metal as the collector, and further being able to improve durability and input/output characteristics (output density), as well as a lithium ion secondary battery made using this electrode for lithium ion secondary batteries.
  • the electrode layer of the electrode for lithium ion secondary batteries using a collector consisting of foam metal is configured by dividing into a plurality of electrode divided parts, whereby the migration distance of electrons and migration distance of ions in each of the electrode divided parts is shortened.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
EP21155153.6A 2020-02-18 2021-02-04 Électrode pour batteries secondaires lithium-ion et batterie secondaire lithium-ion Withdrawn EP3869596A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020024969A JP7078658B2 (ja) 2020-02-18 2020-02-18 リチウムイオン二次電池用電極、およびリチウムイオン二次電池

Publications (1)

Publication Number Publication Date
EP3869596A1 true EP3869596A1 (fr) 2021-08-25

Family

ID=74553615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21155153.6A Withdrawn EP3869596A1 (fr) 2020-02-18 2021-02-04 Électrode pour batteries secondaires lithium-ion et batterie secondaire lithium-ion

Country Status (4)

Country Link
US (1) US20210257622A1 (fr)
EP (1) EP3869596A1 (fr)
JP (1) JP7078658B2 (fr)
CN (1) CN113346042B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11929522B2 (en) 2021-09-24 2024-03-12 Apple Inc. Battery cells with tabs at right angles
US11942661B2 (en) 2021-09-24 2024-03-26 Apple Inc. Battery cells with tabs at right angles
US11870100B2 (en) * 2021-09-24 2024-01-09 Apple Inc. Battery cells with tabs at right angles

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0799058A (ja) 1993-09-28 1995-04-11 Mitsubishi Chem Corp 二次電池用電極構造
JPH08329954A (ja) 1995-05-30 1996-12-13 Shin Kobe Electric Mach Co Ltd 電池用極板及びその製造方法
JP2000106154A (ja) 1998-09-28 2000-04-11 Matsushita Electric Ind Co Ltd 全固体電池およびその製造法
WO2013123126A1 (fr) * 2012-02-14 2013-08-22 Fusion Energy Holding Limited Batterie au lithium-ion et ses procédés de fabrication
WO2017015405A1 (fr) * 2015-07-20 2017-01-26 CellMotive Co. Ltd. Fabrication d'électrode d'anode poreuse tridimensionnelle
WO2017052818A1 (fr) * 2015-09-25 2017-03-30 Intel Corporation Batterie rechargeable et procédé de suppression de dendrite
US20190288295A1 (en) * 2018-03-14 2019-09-19 Seung-Ki Joo Lithium negative electrode having metal foam and lithium secondary battery using the same
JP2020024969A (ja) 2018-08-06 2020-02-13 株式会社ディスコ ウェーハの加工方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011048991A (ja) * 2009-08-26 2011-03-10 Nissan Motor Co Ltd リチウムイオン二次電池
JP5497538B2 (ja) * 2010-06-01 2014-05-21 日本電信電話株式会社 固体型二次電池
EP3699999A4 (fr) * 2017-10-17 2021-07-14 NGK Insulators, Ltd. Batterie secondaire au lithium et procédé de fabrication de dispositif incorporant une batterie
KR102481154B1 (ko) * 2018-03-27 2022-12-23 엔지케이 인슐레이터 엘티디 리튬 이차 전지

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0799058A (ja) 1993-09-28 1995-04-11 Mitsubishi Chem Corp 二次電池用電極構造
JPH08329954A (ja) 1995-05-30 1996-12-13 Shin Kobe Electric Mach Co Ltd 電池用極板及びその製造方法
JP2000106154A (ja) 1998-09-28 2000-04-11 Matsushita Electric Ind Co Ltd 全固体電池およびその製造法
WO2013123126A1 (fr) * 2012-02-14 2013-08-22 Fusion Energy Holding Limited Batterie au lithium-ion et ses procédés de fabrication
WO2017015405A1 (fr) * 2015-07-20 2017-01-26 CellMotive Co. Ltd. Fabrication d'électrode d'anode poreuse tridimensionnelle
WO2017052818A1 (fr) * 2015-09-25 2017-03-30 Intel Corporation Batterie rechargeable et procédé de suppression de dendrite
US20190288295A1 (en) * 2018-03-14 2019-09-19 Seung-Ki Joo Lithium negative electrode having metal foam and lithium secondary battery using the same
JP2020024969A (ja) 2018-08-06 2020-02-13 株式会社ディスコ ウェーハの加工方法

Also Published As

Publication number Publication date
JP2021131930A (ja) 2021-09-09
CN113346042B (zh) 2024-05-31
JP7078658B2 (ja) 2022-05-31
US20210257622A1 (en) 2021-08-19
CN113346042A (zh) 2021-09-03

Similar Documents

Publication Publication Date Title
EP3869596A1 (fr) Électrode pour batteries secondaires lithium-ion et batterie secondaire lithium-ion
JP6142884B2 (ja) 非水電解質二次電池の製造方法
EP2006941B1 (fr) Électrode de batterie
EP2485300B1 (fr) Batterie secondaire au lithium et procédé de sa fabrication
EP3193392A1 (fr) Électrode positive pour cellule secondaire au lithium-ion et, cellule secondaire au lithium-ion
EP3193393A1 (fr) Électrode positive pour cellule secondaire au lithium-ion et cellule secondaire au lithium-ion
US7960050B2 (en) Secondary cell and its manufacturing method
EP3663265A2 (fr) Matériau actif d'électrode positive pour batterie secondaire au lithium et batterie secondaire au lithium l'incluant
EP3312908B1 (fr) Procédé de fabrication d'une électrode négative
CN108808068A (zh) 二次电池
EP3719892A1 (fr) Pâte de matériau conducteur pour éléments électrochimiques, composition de bouillie pour électrodes positives d'élément électrochimique et son procédé de production, électrode positive pour éléments électrochimiques, et élément électrochimique
EP3496188B1 (fr) Procédé de fabrication de batterie à électrolyte solide au sulfure
JP6946694B2 (ja) リチウムイオン二次電池
EP3053219B1 (fr) Batterie secondaire à électrolyte non aqueux et procédé de fabrication de celle-ci
EP3200265A1 (fr) Batterie, bloc-batterie et alimentation d'energie continue
EP3866221B1 (fr) Électrode de batterie secondaire au lithium-ion et batterie secondaire au lithium-ion
EP3809490A1 (fr) Électrode pour batteries secondaires lithium-ion et batterie secondaire lithium-ion
EP4333109A1 (fr) Anode et batterie secondaire la comprenant
EP3809491B1 (fr) Électrode pour batteries secondaires lithium-ion et batterie secondaire lithium-ion
EP3975284A1 (fr) Électrode pour batterie secondaire présentant une meilleure performance de charge rapide, son procédé de fabrication, et batterie secondaire la comprenant
KR20220042995A (ko) 급속 충전 성능이 개선된 이차전지용 전극, 이의 제조방법 및 이를 포함하는 이차전지
EP3879598B1 (fr) Électrode pour batterie secondaire lithium-ion et batterie secondaire lithium-ion
EP4033563A2 (fr) Électrode et dispositif de stockage d'électricité
EP4213262A1 (fr) Batterie secondaire à faible résistance d'élément et d'excellentes caractéristiques de durée de vie

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20210204

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20220919

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: H01M 10/0525 20100101ALN20230907BHEP

Ipc: H01M 4/80 20060101ALI20230907BHEP

Ipc: H01M 4/66 20060101AFI20230907BHEP

INTG Intention to grant announced

Effective date: 20230926

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20240207